.container * {
    margin: 0;
    padding: 0;
}

.container a {
    text-decoration: none;
}

.container {
    position: relative;
    width: 600px;
    height: 400px;
    margin: 100px auto 0 auto;
    box-shadow: 0 0 5px purple;
    overflow: hidden;
    transition: linear ease 2s;
}

.container .wrap {
    position: absolute;
    width: 4200px;
    height: 400px;
    z-index: 1;
    /*left: -600px;*/
}

.container .wrap img {
    float: left;
    width: 600px;
    height: 400px;
}

.container .buttons {
    position: absolute;
    right: 5px;
    bottom: 40px;
    width: 150px;
    height: 10px;
    z-index: 2;
}

.container .buttons span {
    margin-left: 5px;
    display: inline-block;
    width: 20px;
    height: 20px;
    /*圆形*/
    /*border-radius: 50%;*/
    background-color: purple;
    text-align: center;
    color: white;
    cursor: pointer;
}

.container .buttons span.on {
    background-color: deeppink;
}

.container .arrow {
    position: absolute;
    top: 35%;
    color: purple;
    padding: 0 14px;
    border-radius: 50%;
    font-size: 50px;
    z-index: 2;
    display: none;
}

.container .arrow_left {
    left: 10px;
}

.container .arrow_right {
    right: 10px;
}

.container:hover .arrow {
    display: block;
}

.container .arrow:hover {
    background-color: rgba(0, 0, 0, 0.2);
}


#adv {
    position: relative;
    margin-bottom: 0.5rem;
}

#adv dl, #adv dd {
    list-style: none;
    margin: 0;
}

#adv dt {
    /*position: absolute;*/
    bottom: 10px;
    right: 5px;
    display: flex;
    /*transition: step-start;*/
    transform: translateX(38px)translateY(20px);
}

#adv dd {
    overflow: hidden;
}

#adv dl dt a {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 24px;
    height: 24px;
    padding: 0 1px 1px 0;
    border-radius: 15px;
    margin-right: 5px;
    background-color: dodgerblue;
    /*background-color: dodgerblue;*/
    color: hsl(0, 0%, 100%);
    text-decoration: none;
    font-size: 0.8rem;
}